<template>
<div class="nav">
  <el-row class="tac">
    <el-col :span="24">
      <el-menu default-active="2" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose">
        <el-submenu index="1">
          <template slot="title"><i class="el-icon-message"></i>导航一</template>
          <el-menu-item-group>
            <template slot="title">分组一</template>
            <el-menu-item index="1-1">选项1</el-menu-item>
            <el-menu-item index="1-2">选项2</el-menu-item>
          </el-menu-item-group>
          <el-menu-item-group title="分组2">
            <el-menu-item index="1-3">选项3</el-menu-item>
          </el-menu-item-group>
          <el-submenu index="1-4">
            <template slot="title">选项4</template>
            <el-menu-item index="1-4-1">选项1</el-menu-item>
          </el-submenu>
        </el-submenu>
        <el-menu-item index="2"><i class="el-icon-menu"></i>导航二</el-menu-item>
        <el-menu-item index="3"><i class="el-icon-setting"></i>导航三</el-menu-item>
      </el-menu>
    </el-col>
  </el-row>
</div>
</template>

<script>
export default {
  name: 'nav',
  data() {
    return {}
  },
  methods: {
     handleOpen(key, keyPath) {
       console.log(key, keyPath);
     },
     handleClose(key, keyPath) {
       console.log(key, keyPath);
     }
   }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style lang="scss" type="text/css" scoped>
.nav{
  width: 200px;
  height: 89%;
}
</style>
